"好久不见"在英语中可以说成"Long time no see",或者更口语化的说法是"It's been a while",如果你想用更具个性的方式表达,也可以说"I haven't seen you in ages"或者"It's been ages since we last met",这些都是非正式的表达方式,适合和亲密的朋友或家人使用。